Tag Archives: battery storage

Blowout Week 159

This week’s lead story features Germany’ faltering Energiewende. We continue with OPEC, Iran, Venezuela, more US oil & gas jobs, Rex Tillerson on Paris and subsidies, Norway to increase oil production, Bradwell approval process begins, clean coal in the US, wind in Austria, hydrogen in Australia, nuclear waste in Spain, Fluor’s small nuclear reactor, EC approves Areva restructuring, UAE to go big on renewables, clean energy funding decreases in 2016, Chernobyl goes solar, solar-powered trains in UK, Swansea Bay tidal recommended for go-ahead, National Grid escapes a breakup and what happens when you crash an F-4 Phantom jet into a reinforced concrete wall. Continue reading

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Can Hawaii go 100% Renewable?

Hawaii’s Renewables Portfolio Standard commits it to obtaining 100% of its energy from renewables by 2045, and Hawaii proposes to do this by wholesale replacement of fossil fuel generation with solar. This approach is theoretically possible, but only if there is enough energy storage (approximately 10GWh) to match day-night solar fluctuations of over 3GW to a substantially flat ~800MW load curve and if grid stability can be mantained with dominant solar generation. The Renewables Portfolio Standard also covers only electricity generation, which presently supplies only about a third of Hawaii’s energy needs, so even if it’s met Hawaii will still fall well short of its 100% renewable energy target. Continue reading

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Solar power on the island of Ta’u, a preliminary appraisal

A 1,400kW(p) solar PV array backed up by 6,000kWh of battery storage and a smart grid has been installed on the island of Ta’u in American Samoa. It’s widely reported that this system already allows Ta’u to obtain 100% of its electricity from renewable sources for 100% of the time, and this brief review suggests that it will in fact be capable of delivering 100% electricity for almost 100% of the time if and when it reaches full operation. Continue reading

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Blowout Week 146

Blowout this week begins with the EU embracing electric vehicles (EVs) and directing citizens to install charging points at home; EU and California target zero emissions; in Germany and China renewables outgrow the grid; Ontario’s broken grid; subsidies boost USA wind; global clean energy investment slumps; The Sun set to produce energy 24/7; home battery storage costs plummet 50% to $10,000; America sacrifices southern forests to save the planet; UK blackout risk averted by consumers paying £122 million; Tesla benefits from South Australia blackout; UK government plans to break the laws of thermodynamics; Baroness Worthington concedes that EU 2020 contributed to Brexit; are Putin and Erdogan the only sane leaders left?; Israeli gas heading for Europe over Turkey; hydrogen rots the minds of policy makers. Continue reading

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The Holy Grail of Battery Storage

A recent Telegraph article claims that storage battery technology is now advancing so fast that “we may never again need to build 20th Century power plants in this country, let alone a nuclear white elephant such as Hinkley Point” and that the “Holy Grail of energy policy” – a storage battery cost of $100/kWh – will be reached in “relatively short order”. This brief post shines the cold light of reality on these claims by calculating battery storage costs based on the storage requirements for specific cases estimated in previous Energy Matters posts. Continue reading

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Blowout week 106

We kick off with “Climate Change” and the recent UK floods? Below the fold: Saudi Arabia considers privatizing Aramco, earthquakes in Oklahoma, a natural gas leak in California, TransCanada sues Obama over Keystone, North Sea oil & gas production up, EU investigates Drax subsidy payments, Ed Davey knighted, military intervention to forestall ISIS in Libya, uranium outlook brightens, Greenland wants out of the Paris Agreement, more battery storage in UK, more renewables in Scotland, the 2015 El Niño ties for strongest on record and the new geologic epoch – the Anthropocene. Continue reading

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Blowout Week 99

Read on to learn about backfiring OPEC strategy, the plight of Canada’s oil producers, the US rig count (down again), hope for the North Sea, Luxembourg joining Austria in the Hinkley suit, the EU-Hungary nuclear dispute, OECD to cut coal plant financing, coal output in India to double, high winds shut down German turbines……. Continue reading

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Blowout week 86

CO2 emissions are in the news in advance of the forthcoming Paris Climate Conference, and now we learn that CO2 emissions from China, the world’s number one emitter, may have been significantly overestimated. Have they? And if they have, how much difference does it make? Continue reading

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How Much Battery Storage Does a Solar PV System Need?

Blowout Week 70 featured Tesla’s new 7 kWh and 10 kWh lithium-ion battery storage units. Will they allow households with rooftop solar PV systems to store enough surplus solar power to fill domestic demand throughout the year without the need to import grid power when the sun isn’t shining? It all depends on how much storage is needed and how much it costs, and in this post I present ball-park estimates of storage requirements and costs for domestic rooftop solar installations calculated using the following simplifying assumptions: Continue reading

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